粉体工学会誌
Online ISSN : 1883-7239
Print ISSN : 0386-6157
論文
定容積せん断試験装置を用いた粉体流動性の新しい評価法
島田 泰拓羽多野 重信松坂 修二
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ジャーナル フリー

2017 年 54 巻 2 号 p. 90-96

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A new method for evaluating powder flowability is developed using a constant volume shear tester; this tester measures the upper and lower normal stresses and the shear stress acting on a powder bed. A single shear test provides a series of characteristics, such as powder yield locus (PYL), consolidation yield locus (CYL), critical state line (CSL), shear cohesion, stress relaxation ratio, stress transmission ratio, and void fraction. The values of the shear stress as a function of the normal stress and the void fraction are visualized in three-dimensional diagrams. Furthermore, powder flowability is evaluated using a flow function obtained from the PYL.

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